this patch from Herbert Xu fixes a race by moving termination of
the URBs into close() exclusively.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NOliver Neukum <oliver@neukum.name>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>